Materials science

Equipment, tools, samples and materials needed to complete the work: Muffle furnace, tank filled with water for tempering, Brinell equipment, magnifying glass for measuring traces, samples of duralumin alloys, sandpaper, cutter.

Procedure for performing laboratory work :

• 
  The hardness (in HB) of softened samples is measured and tabulated;
  
• 
  D 16 alloy is put into the furnace for tempering (furnace temperature is 500 50 C , heating time ^is calculated as 2 minutes per 1 mm);
  
• 
  Samples are taken out of the oven one by one and soaked in water;
  
• 
  After collecting, both sides of the samples are cleaned with sandpaper;
  
• 
  The hardness of the samples is measured and included in the table;
  
• 
  The collected samples are artificially aged one after the other for 30 minutes at a temperature of 100⁰C200 ⁰ (for this, it is necessary to load the collected samples into ovens heated to 100⁰C, 200⁰C, one by one 300⁰C);
  
• 
  The aged samples are cleaned on both sides and measured in hardness (HB);
  
• 
  A graph of the dependence of the determined hardness on the artificial wear temperature is drawn;
  
• 
  The obtained data are included in table 14.1
  

Laboratory procedure:

1. 
   The microstructure of the studied non-ferrous metals and their alloys is drawn;
   
2. 
   Brands, chemical composition, properties of studied alloys, type of thermal treatment, number of phases, area of use of the alloy are written;
   
3. 
   The magnification level of the microscope is determined and recorded.
   

The following shall be included in the laboratory report:

1. 
   Schemes of microstructures of studied non-ferrous metals and alloys;
   
2. 
   State diagram of aluminum-silicon alloys;
   
3. 
   The essence of the processes of modification of silumin and aging of duralumin is highlighted;
   
4. 
   Properties and areas of use of studied non-ferrous metals and alloys are shown;
   
5. 
   General conclusions.